Manufacture of glass tiles.



No. 739,333. PATENTBD s313122, 1903. W. T. NIcHoLLs.

MANU'FG'IURE OP GLASS TILES.

APPLICATION FILED FEB. 20. 1901.

NO MODEL.

WITNESSES INVENTOR #QQ/7 W me mums Perini co. mmc-nimo, wnmmm. D c.

UNITEDv STATES c Patented September 22, 1903.

PATENT OFFICE.

MNUFCTURE OF GLASS TILES.

SPECIFICATION forming part of Letters Patent No. 739,338, datedSeptember 22, 1903.

Application iiled February 20, 1901. Serial Ilm/18,136. (No model.)

ing had to the accompanying drawings, forming part of thisspecification, in which-f Figure l is a partial vertical section of aglass-rolling apparatus, showing the method of making my improved tile;and Fig. 2 is a perspective View of the tile itself.

Myinvention relates tothe glass tiles which are used for walls,ceilings, .or floors and which have heretofore been yprovided withbacking material applied to their rear faces, and is designed. to doaway with the trouble and expense of applying backing to the sheet afterit is formed and provide a tile with integral projections whichmay becut into any size or shape desired.

In the drawings I show in Fig. lthe manner of forming my improved tile,the glass being rolled -upon a table 2 by means of a roller 3, as in theusual method of forming plate-glass. with a series of indentations orgrooves,which are preferably undercut, as shown at 4, so as to provideangular projections 5 upon the back of the rolled sheet with flat spacesbetween them. The teeth are comparatively small, being shown in aboutfull size in Fig.`v

l, and I have found that by forming small projections of this natureseparated by fiat faces they do not interfere with the cutting of theglass on any desired lines. After the The table, however, is providedplate may then be annealed in the ordinary manner and cut up into tilesof the desired shape and size.

The glass is of course opaque, being either white or of any desiredcolor, and in apply` ing the tiles to the wall the undercut projectionswill engage the plaster and hold the tiles vsecurely in place. Y

The advantages of my invention result from the rolling of the glass withprojections thereon which will engage ,the plaster or other surfacingand hold the tile in place. These projections may be of any desiredshape, but'are preferably undercut, as shown, so that the cement ormortar may enter the undercut portions and secure the tile in place.

The forming of the tile in the manner above stated gives a smooth frontface, since'the top of the sheet over which the roller passes forms thefront of the tiles, and the back of the rolled sheet, which is alwaysrough, is formed with the locking projections.

Many variations may be'made in the shape and size of the projections,the material of the sheet, &c., without departing frpm my invention.

1. The method of forming a tile which consists in rolling its front faceand simultaneously molding undercut projections on its rear face,substantially as described.

2. A tile having a rolled front face and undercut molded projections onits rear face, all of said projections extending in the same direction;substantially as described.

In testimony whereof I have hereunto set HENRY MGKINLEY.

